Any solution for this yet.. I am seeing this kind of errors for more then a year.. According to me the this is beacuse android kills the activity so the refrence object is lost but i want to know what if we place a code in the on pause method to save the object with relp of shared refrence and retrive it when app resumes. Here is log cat report of the error in my app. java.lang.RuntimeException: Unable to start activity ComponentInfo{com.rjapp/com.rjapp.BT_screen_menuButtons}: java.lang.NullPointerException at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1659) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1675) at android.app.ActivityThread.access$1500(ActivityThread.java:121) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:943) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:138) at android.app.ActivityThread.main(ActivityThread.java:3701) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:507) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:878) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:636) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.NullPointerException at com.rjapp.BT_viewUtilities.updateBackgroundColorsForScreen(BT_viewUtilities.java:67) at com.rjapp.BT_screen_menuButtons.onCreate(BT_screen_menuButtons.java:122) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1623) ... 11 more

from the log cat details it seems that there is something wrong in the menu button plugin. check whether you have put correct code of the background color of that screen. for eg- #000000 for white. it should be # plus six digit (or alphabetic) code. i think you are missing something here.

All the colour codes are correct in my App. The coulour feature works great. This is the log from my playstore crash section. only 12 reports for 500users...so only some face the issue. Though even i faced it today so i posted it.

Will have to check what the code is on line 122 of BT_screen_menuButtons.java plugin file.

line 67 in bt_viewUtilities is debug code (well, it is in mine - I don't think I've made any changes to that file..), you could just comment that out. Not sure about line 122 of BT_screen_menuButtons as I've got loads of code changes - it could be debug code too?